Cheapest one-way flights from London to Dublin in September from $103

AirHint found the following cheapest one-way flights from London (LCY) to Dublin (DUB) in September 2025 (see full year).

One-Way flights

30 Sep British Airways direct
29 Sep British Airways direct
16 Sep British Airways direct
22 Sep British Airways direct
15 Sep British Airways direct
17 Sep British Airways direct
25 Sep British Airways direct
20 Sep KLM
27 Sep KLM
19 Sep KLM

Also check the deals for return flights from London to Dublin in September.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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